The technology for producing montmorillonite modified with polyionenes has been developed. It was shown that macromolecular polymer intercalation of the quaternary ammonium salt of montmorillonite intercrystalline space is accompanied by an increase in interlayer distances from 1.08 to 1.67 nm. A method for the synthesis of montmorillonite modified with polyionenes is proposed. The optimal conditions for the sorption of polymeonene molecules by montmorillonite were found: the concentration of the aqueous dispersion of montmorillonite is 1%, the temperature of the reaction medium is 40 ° C, the ratio of montmorillonite-polyionene is 3: 1, the processing time is 24 hours.
The obtaining technology of nanocomposites based on polyamide-6 and organomodified montmorillonite is developed. The technological parameters of extrusion and injection molding, and their influence on the formation of nanoscale inorganic phase of the polyamide are investigated. Morphology and thermal behavior of polyamide-6, composites based on polyamide-6 and modified montmorillonite are studied by WAXS, XRD, DTA and DSC data. Morphology and thermal behavior of polyamide-6 and composites based on polyamide-6 and modified montmorillonite are shown to be in a strong juxtaposition. New γ-phase formation is revealed in composite polyamide-6 – 1–2 % of modified montmorillonite in contrast with polyamide-6 and mechanical mixtures of polyamide-6 and montmorillonite. Optimal concentrations of modified montmorillonite in the composites stated as 1 – 2 % are shown to correspond with composites improved properties as compared to initial polyamide-6. It is explained by increasing crystallinity degree, which resulted from acting of modified montmorillonite particles as nucleation heterogenetic agents.
The operating characteristics adsorptive regenerator of low-potential heat and moisture based on composite sorbents ‘silica gel – sodium sulphate’ and ‘silica gel – sodium acetate’ synthesized by sol – gel method are studied. Sorption heat regenerator operating and environmental test results are shown. Flows switch-over time is observed to depend on airflow rate and temperature differential between warm and cold ends of regenerator in steady-state conditions. Time dependences of absolute and relative humidity on the warm and cold regenerator ends are shown to be of periodic nature when both of sorbent used. Time dependences of temperature are observed to be periodic nature on warm and cold ends of regenerator and between holders with sorbent. Amplitude of time dependences of absolute and relative humidity and temperature for ‘silica gel – sodium acetate’ are stated to be less than observed when composite ‘silica gel – sodium sulphate’ used. Correspondence of temperature and humidity time dependences and sorbent sorption capacity is shown. Correlation between heat-regeneration-coefficient-dimensionless temperature differential and moisture-regeneration coefficients-dimensionless humidity differential dependences is approximated with fair accuracy for engineering calculation by linear polynomials of degree 2. Similarity of polynomials described both of dependences is shown to result from close interrelation between heat and mass transfer processes. These coefficients are shown to be capable of task-oriented variation in sufficient wide ranges by changing of half-cycle time, sorbent granules sizes and its amount. The investigation results can be used for development energy-efficient ventilation systems for residential and storage premises.
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